hi to everyone who reads this but i need some help

got a zetec turbo and i had a starting problem so i replaced battery and starter and solnoid and also the ignition switch
after putting ignition switch on i have no power to it so when i but key to on postion no lights come on the dash no lights work just dead the only thing i have found working is the cig lighter , buzzer that goes of when door is open and lights turned on even though lights dont come on
do you think i could be a relay or fuse box or ecu
there is power to the fuse box
do you have to have your ecu reprogrammed because i changed ignition switch or anything like that

hope anyone out there can help as i am missing my car and dont like public transport